Finding the Fourth Proportional to 104,103.78, 143,662.56 and 56,356.78

Step by Step Solution

1. Step 1: Write the proportion equation
   104,103.78 : 143,662.56 = 56,356.78 : x
2. Step 2: Convert to fraction form
   104,103.78/143,662.56 = 56,356.78/x
3. Step 3: Cross multiply
   104,103.78x = 143,662.56 × 56,356.78
4. Step 4: Simplify right side
   104,103.78x = 8,096,359,288.16
5. Step 5: Solve for x
   x = 8,096,359,288.16/104,103.78
6. Step 6: Final answer
   x = 77,772.00